Hi Janie,
Your mom and sister are so lucky to have someone as sensible and sensitive as you. Some things I have found helpful:

19 pound wheelchair, $198. and one thing will be paid by medicare if bought from medical supply company that knows how to bill medicare properly (don't go to walgreens)

walkers that are red with a small seat and four wheels, with brakes

The CNA study guide for tips on doing CNA stuff (I meant to get my CNA and still will by challenge but haven't had time)

ejector recliner for people who can't get out of chair easily

centers for independent living or churches can build ramps for not much money or free

home modifications can be gotten from local modification programs in some cities for low income (don't know if your mom qualifies but the cutoff is probably about 22,500 per year)

meals on wheels and lifeline and free cellphone service

temporary ssd ???? and the PIP part of car insurance

I realize you probably know about most of this but thought I'd share anyway because I have used a lot of this stuff for clients

no offense to anyone who says "take care of yourself" but I find that concrete suggestions and offers of specific help are more useful than the global directive....
love and strength hg